0000000001301655
AUTHOR
Jean-pierre Dognon
Large shape staggering in neutron-deficient Bi isotopes
The changes in the mean-square charge radius (relative to 209Bi), magnetic dipole, and electric quadrupole moments of 187,188,189,191Bi were measured using the in-source resonance-ionization spectroscopy technique at ISOLDE (CERN). A large staggering in radii was found in 187,188,189Big, manifested by a sharp radius increase for the ground state of 188Bi relative to the neighboring 187,189Big. A large isomer shift was also observed for 188Bim. Both effects happen at the same neutron number, N=105, where the shape staggering and a similar isomer shift were observed in the mercury isotopes. Experimental results are reproduced by mean-field calculations where the ground or isomeric states were…
Functionalization of Bambusurils by a Thiol-Ene Click Reaction and a Facile Method for the Preparation of Anion-Free Bambus[6]urils
Sulfide-functionalized bambus[4]urils ((RS)8 BU[4]) and bambus[6]urils ((RS)12 BU[6]) were synthesized through thiol-ene click coupling reactions (TEC) of allylbambus[n]urils. Thiosugars were grafted to BU[4] and BU[6]. Synthesis of BU[6] derivatives always requires the use of a template anion (iodide, chloride, or bromide), which is enclosed in the cavity of BU[6]. We show that this anion influences the reactivity of bambus[6]urils. An encapsulated iodide makes allyl functions of allyl12 BU[6] less reactive towards TEC and hydrogenation reactions in comparison to the corresponding chloride or bromide inclusion complexes. This is critical for the chemical reactivity of BU[6] and even more t…
CCDC 1553488: Experimental Crystal Structure Determination
Related Article: Djamille Azazna, Marine Lafosse, Julie Rivollier, Jialan Wang, Imen Ben Cheikh, Michel Meyer, Pierre Thury, Jean-Pierre Dognon, Gaspard Huber, Marie-Pierre Heck|2018|Chem.-Eur.J.|24|10793|doi:10.1002/chem.201801468
CCDC 1553489: Experimental Crystal Structure Determination
Related Article: Djamille Azazna, Marine Lafosse, Julie Rivollier, Jialan Wang, Imen Ben Cheikh, Michel Meyer, Pierre Thury, Jean-Pierre Dognon, Gaspard Huber, Marie-Pierre Heck|2018|Chem.-Eur.J.|24|10793|doi:10.1002/chem.201801468